package jdbc;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.Statement;

/**
 * 执行DML语句，向user表中插入一条记录
 */
public class JDBCDemo2 {
    public static void main(String[] args) throws Exception {
        Class.forName("com.mysql.cj.jdbc.Driver");
        Connection connection = DriverManager.getConnection(
                "jdbc:mysql://localhost:3306/tedu?characterEncoding=utf8&useSSL=false&serverTimezone=Asia/Shanghai&rewriteBatchedStatements=true",
                "root",
                "root"
        );
        Statement statement = connection.createStatement();
        /*
            INSERT INTO user(username,password,nickname,age)
            VALUES('张三','123456','阿三',22)
         */
        String sql = "INSERT INTO user(username,password,nickname,age) " +
                     "VALUES('张三','123456','阿三',22)";
        /*
            int executeUpdate(String sql)
            该方法专门用于执行DML语句，返回的int值表示执行后影响了表中多少条记录
         */
        int num = statement.executeUpdate(sql);
        System.out.println(num > 0 ? "插入成功！" : "插入失败！");

        connection.close();
    }
}
